ref #7010 Adapt descriptive view handlers for multiple selection

some smaller changes for drag & drop of factual data

ref #2380: implement usage of Dto for taxon navigator

fix multiple representation by removing conversation of selection dialog

ref #6595 Remove exception from editor opening

ref #6595 code refactoring

ref #6925 Inject context into operations to allow sync/async execution

ref #6595 refactor selection handling to migrated name editor

Merge branch 'develop' into nameEditorE4

Conflicts:¶

eu.etaxonomy.taxeditor.editor/fragment.e4xmi¶

ref #6907 migrate remaining handlers